Stems - Erect, herbaceous but stout, typically simple, from a taproot, with milky sap, pubescent and also with a vertical line of tomentoulose hairs decurrent from the base of each petiole, to +1m tall.

Other info. - This showy species can be found throughout Missouri. The plant is quite striking and would grow with little care in a garden. This species also attracts many flying insects and would be a great addition to a butterfly garden.
The stems of A. purpurascens produce copious amounts of milky sap when injured. This sap can be irritating to some and is toxic if ingested or rubbed in the eyes.

Photographs taken off Hwy 21, Reynolds County, MO., 6-1-03, and off Hwy 106, Shannon County, MO., 6-12-04.